Tools

• 0xf.at - a website without logins or ads where you can solve password-riddles (so called hackits).
• Hack This Site! - a free, safe and legal training ground for hackers to test and expand their hacking skills
• fuzzy.land - Website by an Austrian group. Lots of challenges taken from CTFs they participated in.
• Gruyere
• TryHackMe - Hands-on cyber security training through real-world scenarios.

• Roppers Computing Fundamentals
• gitbook
• Corelan Team's Exploit writing tutorial
• Exploit Writing Tutorials for Pentesters
• Shells
• Missing Semester
• Exploit Writing Tutorials for Pentesters
• Shells
• Understanding the basics of Linux Binary Exploitation
• Exploit Writing Tutorials for Pentesters

Docker Images for Penetration Testing & Security

• Begin RE: A Reverse Engineering Tutorial Workshop
• Malware Unicorn Reverse Engineering Tutorial
• Lena151: Reversing With Lena
• Malware Analysis Tutorials: a Reverse Engineering Approach

• Hackers tools - Tutorial on tools.
• Metasploit
• mimikatz - A little tool to play with Windows security

Docker Images for Penetration Testing & Security

• official Kali Linux
• official WPScan
• Official Metasploit
• Damn Vulnerable Web Application (DVWA)
• Vulnerability as a service: Shellshock
• Vulnerability as a service: Heartbleed
• Security Ninjas
• Arch Linux Penetration Tester
• Docker Bench for Security
• OWASP Security Shepherd
• OWASP WebGoat Project docker image
• OWASP Mutillidae II Web Pen-Test Practice Application
• Docker Metasploit
• official OWASP ZAP
• OWASP NodeGoat
• Security Ninjas
• Vulnerability as a service: Heartbleed
• OWASP Juice Shop
• Vulnerability as a service: Shellshock

Disassemblers and debuggers

• OllyDbg - A 32-bit assembler level analysing debugger for Windows
• x64dbg - An open-source x64/x32 debugger for Windows
• ScratchABit - Easily retargetable and hackable interactive disassembler with IDAPython-compatible plugin API

Decompilers

• dotPeek - a free-of-charge .NET decompiler from JetBrains
• cutter - a decompiler based on radare2.
• Hex-Rays
• Krakatau - the best decompiler I have used. Is able to decompile apps written in Scala and Kotlin into Java code. JD-GUI and Luyten have failed to do it fully.
• JD-GUI
• Luyten - one of the best, though a bit slow, hangs on some binaries and not very well maintained.
• JADX - a decompiler for Android apps. Not related to JAD.
• snowman
• uncompyle6 - decompiler for the over 20 releases and 20 years of CPython.

Deobfuscators

• JS Nice - a web service guessing JS variables names and types based on the model derived from open source.
• de4dot - .NET deobfuscator and unpacker.

Execution logging and tracing

• Wireshark - A free and open-source packet analyzer
• usbmon - USB capture for Linux.

Binary files examination and editing

• Synalize It
• PEview - A quick and easy way to view the structure and content of 32-bit Portable Executable (PE) and Component Object File Format (COFF) files
• BinText - A small, very fast and powerful text extractor that will be of particular interest to programmers.
• Spyse - Data gathering service that collects web info using OSINT. Provided info: IPv4 hosts, domains/whois, ports/banners/protocols, technologies, OS, AS, maintains huge SSL/TLS DB, and more... All the data is stored in its own database allowing get the data without scanning.
• Findsubdomains - A subdomains discovery tool that collects all possible subdomains from open source internet and validates them through various tools to provide accurate results.
• CSP Scanner - Analyze a site's Content-Security-Policy (CSP) to find bypasses and missing directives.
• Shodan - A web-crawling search engine that lets users search for various types of servers connected to the internet.
• Decompiler.com - Java, Android, Python, C# online decompiler.
• findsubdomains - really fast subdomains scanning service that has much greater opportunities than simple subs finder(works using OSINT).
• cirt-fuzzer - A simple TCP/UDP protocol fuzzer.
• ASlookup - a useful tool for exploring autonomous systems and all related info (CIDR, ASN, Org...)
• ZAP - The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding vulnerabilities in web applications
• nmap - Nmap (Network Mapper) is a security scanner
• Scapy - A Python tool and library for low level packet creation and manipulation
• Autopsy - A digital forensics platform and graphical interface to [The Sleuth Kit](http://www.sleuthkit.org/sleuthkit/index.php) and other digital forensics tools
• CAINE - CAINE is a Ubuntu-based app that offers a complete forensic environment that provides a graphical interface. This tool can be integrated into existing software tools as a module. It automatically extracts a timeline from RAM.
• Spyse - Data gathering service that collects web info using OSINT. Provided info: IPv4 hosts, domains/whois, ports/banners/protocols, technologies, OS, AS, maintains huge SSL/TLS DB, and more... All the data is stored in its own database allowing get the data without scanning.
• IPED - Indexador e Processador de Evidências Digitais - Brazilian Federal Police Tool for Forensic Investigation
• Wifi Jammer - Free program to jam all wifi clients in range
• CSP Scanner - Analyze a site's Content-Security-Policy (CSP) to find bypasses and missing directives.
• Wifi Jammer - Free program to jam all wifi clients in range

Other

• nudge4j - Java tool to let the browser talk to the JVM
• dex2jar - Tools to work with Android .dex and Java .class files
• antinet - .NET anti-managed debugger and anti-profiler code

Tools

• Aircrack - Aircrack is 802.11 WEP and WPA-PSK keys cracking program.

Docker Images for Penetration Testing & Security

• Exploit database - An ultimate archive of exploits and vulnerable software

Binary files examination and editing

• Open Malware

Tools

• Hack+ - An Intelligent network of bots that fetch the latest InfoSec content.
• CTFtime.org - All about CTF (Capture The Flag)
• WeChall
• CTF archives (shell-storm)
• Rookit Arsenal - OS RE and rootkit development
• Roppers CTF Fundamentals Course - Free course designed to get a student crushing CTFs as quickly as possible. Teaches the mentality and skills required for crypto, forensics, and more. Full text available as a [gitbook](https://www.hoppersroppers.org/ctf/).

Tools

• Reversing.kr - This site tests your ability to Cracking & Reverse Code Engineering
• CodeEngn - (Korean)
• Crackmes.de - The world first and largest community website for crackmes and reversemes.

Tools

• Bugcrowd
• Hackerone
• Intigriti

Tools

• DEF CON
• CSAW CTF
• Pliad CTF
• RuCTFe
• Ghost in the Shellcode
• SECUINSIDE CTF
• Codegate CTF
• Boston Key Party CTF
• ZeroDays CTF
• Pico CTF
• Insomni’hack

Tools

• Security related Operating Systems @ Rawsec - Complete list of security related operating systems
• Best Linux Penetration Testing Distributions @ CyberPunk - Description of main penetration testing distributions

Tools

• Roppers Security Fundamentals - Free course that teaches a beginner how security works in the real world. Learn security theory and execute defensive measures so that you are better prepared against threats online and in the physical world. Full text available as a [gitbook](https://www.hoppersroppers.org/security/).
• Roppers Practical Networking - A hands-on, wildly practical introduction to networking and making packets dance. No wasted time, no memorizing, just learning the fundamentals.
• Rawsec's CyberSecurity Inventory - An open-source inventory of tools, resources, CTF platforms and Operating Systems about CyberSecurity. ([Source](https://gitlab.com/rawsec/rawsec-cybersecurity-list))